package com.tengfei.main.meituan;

import java.util.Scanner;

/**
 * @author feige
 * @version v1.0
 * @date 2022-11-21-20:10
 * @description
 */
public class Qu2 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int len = sc.nextInt();
        String strA = sc.next();
        String strB = sc.next();
        StringBuilder sb = new StringBuilder();
        sc.close();
        int m = 0, n = 0;
        for (int i = 0; i < len; i++) {
            sb.append(strA.charAt(m));
            m++;
            sb.append(strB.charAt(n));
            n++;
        }
        System.out.println(sb.toString());
    }

}
